A paramyxovirus was isolated from diseased pigeons, submitted to the Poultry Section of the Veterinary
Research Institute, Onderstepoort, for post-mortem examination. The mean death time for the isolates was
determined to ascertain the virulence of the virus. Infectivity trial showed that the paramyxovirus was nonvirulent for 60- and 4-week-old chickens infected by the intraocular and intratracheal routes.
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